Economical and environment-friendly goaf filling method and device

A filling device and goaf technology, which can be used in fillings, safety devices, mining equipment, etc., can solve the problem of high construction cost, and achieve the effects of reducing filling costs, saving funds, and protecting resources and the environment.

Active Publication Date: 2021-11-12
SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an economical and environment-friendly goaf filling method and its filling device to solve the problem of high cost of the existing cement filling goaf method

Method used

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  • Economical and environment-friendly goaf filling method and device
  • Economical and environment-friendly goaf filling method and device
  • Economical and environment-friendly goaf filling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An economical and environment-friendly goaf filling method, comprising:

[0038] S1. Conveying cement

[0039] Cement enters the gob by pumping through the slurry inlet pipe 8;

[0040] S2. Convey geopolymer

[0041] After conveying cement for 25 minutes, start to convey the geopolymer through the filling device, and the conveyed geopolymer enters the goaf through the feed port 2, and at the same time, the slurry inlet pipe 8 continues to pump cement at a pumping speed of 100L / min, conveying the geopolymer The polymer enters the hopper 3 under the action of the vibrator 6, and the cement with a higher consistency can carry the geopolymer into the goaf. In order to ensure the filling effect, the device stops for 15 minutes every 1 hour. When the filling height is close to the mining area When the roof of the empty area is about 0.5m, stop the injection of geopolymer and cement;

[0042] S3, strengthening the formation

[0043] At the position 0.5m below the roof of t...

Embodiment 2

[0050] The difference with Example 1 is:

[0051] The preparation method of described geopolymer is:

[0052] S21. Select according to the mass fraction: 48 parts of red mud, 7 parts of cement, 2 parts of mineral powder, 2 parts of desulfurized gypsum, 30 parts of fly ash, 2 parts of ceramic particles, 2 parts of zirconia and 4 parts of admixture.

Embodiment 3

[0054] The difference with embodiment 2 is:

[0055] S21. Select according to the mass fraction: 50 parts of red mud, 8 parts of cement, 3 parts of mineral powder, 3 parts of desulfurized gypsum, 40 parts of fly ash, 1 part of ceramic particles, 1 part of zirconia and 3 parts of admixture.

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Abstract

The invention discloses an economical and environment-friendly goaf filling method. The method comprises the steps that S1, cement is pumped into a goaf through a slurry inlet pipe; S2, after the cement is conveyed for 20-25 min, a filling device starts to convey the conveyed geopolymer, the conveyed geopolymer enters the goaf through a feeding port, meanwhile, the cement is continuously pumped through a slurry inlet pipe, the pumping speed of the slurry inlet pipe is 100-200 L / min, the conveyed geopolymer enters a feeding hopper under the action of a vibrator, the high-consistency cement in the slurry inlet pipe can carry the conveyed geopolymer into the goaf, and when the filling height is about 0.5-0.8 m close to a top plate of the goaf, the injection of the conveyed geopolymer and the cement are stopped; and S3, acrylate grouting liquid is injected into the position 0.5-0.8 m below the top plate of the goaf through pressure feeding equipment, the acrylate grouting liquid is diffused, gelled and solidified in the goaf, and the conveyed geopolymer is limited. According to the economical and environment-friendly goaf filling method, the problem that an existing goaf cement filling method is high in manufacturing cost is effectively solved.

Description

technical field [0001] The invention relates to the technical field of geological survey, in particular to an economical and environment-friendly goaf filling method and a filling device thereof. Background technique [0002] With the development of the economy and the vigorous development of coal resources, the mining and utilization of coal have caused serious pollution to the environment. On the one hand, after coal mining, a huge hollow area is left underground. As time goes by, the roof stratum of the goaf collapses under its own gravity, causing ground subsidence and subsidence, seriously endangering the buildings, roads, railways and buildings on the ground. If the farmland is not treated, it will seriously threaten the safety of human life and property. On the other hand, the use of coal to generate electricity produces a large amount of solid waste, mainly including desulfurized gypsum and fly ash. environment and a waste of resources. [0003] At present, cement...

Claims

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Application Information

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IPC IPC(8): E21F15/00C04B28/00
CPCE21F15/00E21F15/005C04B28/00C04B2111/00724C04B2201/50C04B18/08C04B18/064C04B18/023C04B18/0409C04B18/12C04B14/306C04B24/226C04B24/32Y02W30/91
Inventor 张云刘广进佟海高海军
Owner SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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